垃圾渗滤液中好氧反硝化生物脱氮的最佳条件

对垃圾渗滤液间歇曝气(曝气时DO为5.5～7 mg/L;停止时DO为1.1～5.5 mg/L),在仅有有机碳、无机氮的条件下进行好氧反硝化作用.通过正交试验确定了好氧反硝化的最佳条件为水力停留时间168 h,DO为5.5～7 mg/L,有机碳源为乙醇,当有机碳源为乙醇时C/N为10.并得出影响好氧反硝化作用因素的重要性排序依次为C/N＞水力停留时间＞有机碳源＞DO.C/N是影响好氧反硝化的主要因素,对TN去除率有高度显著的影响;水力停留时间对TN去除率有显著影响;有机碳源对TN去除率有一定影响;DO对TN去除率没有显著影响.

The best condition of bioremoval nitrogen by aerobic denitrification process in leachate

The leachate was aerated intermittently with DO 5. 5-7 mg/L and DO 1.1-5. 5 mg/L at the end of the experiment Aerobic denitrification was conducted under the condition of organic carbon, in organic nitrogen and the condition with HRT 168 h and DO 5. 5-7 mg/L. By cross experiment, the suitable conditions in the aerobic denitrification were as follows: HRT was 168 h, DO was 5. 5 -7 mg/L, organic carbon source was ethanol and C/N was 10:1. And the relationship among effec tive factors was: C/N>HRT>organic carbon>DO. The conclusion was drawn that C/N was the dominant factor which had greater impact on TN removal rates than HRT and organic carbon. The change of DO didn't affect TN removal rates much.